Most interesting in System Utilities

Free
A free app for Mac, by Apalon
The code-reading utility app
Realistic and Flexible Timekeeping Application for Personal Computers
A simple timer app for your desktop
A free program for Mac, by Pocket Bits LLC.

Top rated in System Utilities

OSXPM
Free

Create, install, and delete packages for Mac OS X with an easy-to-use app and shell API.

Panic Button
Free

Hide your browsing with Panic Button: one click to hide all Firefox windows.

ScanGear Starter
Free

Scan and save images to your computer desktop.

DrasticInputSourceStatus

DrasticInputSourceStatus changes the menubar color to show the current Input Source.

Input Managers

Input Managers allow older InputManagers to work in Leopard, Mac OS X 10.5.

Mouse Locator Installer
Free

A perfect combination for Mac OS X users: instantly reveals mouse position, adjustable trigger time from 1 sec.

InfoSlips ForMe Viewer
Free

Open InfoSlips quickly and easily.

queue
Free

Control the live image with the Camera Settings interface.

rgGamma
Free

App to control screen gamma, brightness, & color.

CampTune
Free

Windows and Mac OS X can work together on Apple hardware, offering a wide range of software.

UI Actions Setup
Free

UI Actions adds automation to AppleScript, allowing scripts to be attached to any Mac OS X app and run when specific user actions are performed.

Snapplr
Free

Ultimate screenshot tool for Mac OS X.

iCyclone
Free

Open source fan controller for Mac OS X with a user friendly interface, support for Growl, Sparkle and Keychain.

Manpower
Free

GUI for accessing Unix/Linux man pages, providing concise descriptions of command-line programs.

ParaDocks
Free

App launcher that enhances the features of the classic OS 9 launcher.

DashboardKiller
Free

Mac OS X utility that helps users switch the Dashboard on/off with a click, saving memory, network, and CPU.

gpsdXConfig
Free

gpsdX is a Mac OS X native, Universal Binary build of GPSd with an installer & GUI config utility.

MacPorts Notifier
Free

PortsNotifier is an open-source notifier for new MacPorts outdated programs, similar to Updater Manager on Ubuntu.

ChangeShortName
Free

ChangeShortName quickly changes a user's Mac OS X account short name with one click.

Force Quit all applications
Free

Force Quit all applications quickly closes all open apps on Mac OS X 10.5 or later.